Window-ventilator.



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'Specification of Letters Patent.

Patented Jan. 9, 1906.

Application filed January 23, 1905. Serial No. 242,227.

Tol all whom it may concern:

Be it known that I, GEORGE W. FROHLICH, a citizen of the United States,residing at Chicago, in the county of Cook and State of Illinois, haveinvented certain new and useful Improvements in Window Ventilators, ofwhich the following is a specification.

My invention relates to window-ventilators, and has for its object toprovide an improved, simple, and eflicient construction whereby theparts of the ventilator may be easily and quickly assembled anddisassembled, the frictional wear of the several parts being'reduced toa minimum.

I will describe my invention more particularly by reference to theaccompanying drawings, wherein- Figure l is a perspective view of aventilator embodying my invention, showing it in its cl'osed position.Figs. 2 and 3 are sectional elevations showing the ventilator indifferent positions. Fig. 4 is an enlarged perspective view of thehinge-sections with fragmental portions of the frames attached thereto.

The same letters of reference designate the same parts throughout theseveral gures of the drawings.

The ventilator shown as embodying my invention comprises an inner frameA, pivoted to swing within an outer frame B. rIhe outer frame B is theouter or stationary member of the ventilator and is preferably made ofright-angular iron bent at intervals to conform to and fit snugly aroundthe inner frame A. Said frame B is made of two pieces t b of equallength, respectively, as shown in Fig. 1, the piece b extending aboveand t extending below the couplers C, to which the ends of said piecesare attached, preferably by rivets. One of the anges c of the iron frameB forms the outline and end surface of the framethat is, the part whichis attached to the window-frame or woodwork of the building. The otherflanges d and extend inwardly at right angles from the flange c, but inreversed position, the flange d beginning at the couplers and extendingupwardly and the flange d beginning at said couplers and extendingdownwardly on the opposite side of the frame B.

The couplers C referred to each comprise a pair of vertical plates e e',connected at their opposite sides by a web. The ends of the webs serveas seats for the sides of the ends of the frame-sections t t', while theplates e e are provided with shoulders level with said web ends toreceive the rear ortions of the ends ofthe frame-sections b The upperend of each lower plate e is provided with a horizontal groove actherein.

The inner frame A is preferably formed of one piece ofright-angular-shaped iron bent at three intervals, the two ends of theiron being preferably riveted together. One of the flanges a of the ironwhich constitutes the frame A forms the outline or end surface of theframe, and the other flange a supports the glass of the ventilator. Theframe carries on its rear surface at each side a plate D, preferably abrass casting, the lower ends of said plates being enlarged and curvedto ride in the grooves x Said lower ends preferably comprise cylindricalportions, whose swinging axes lie outside the plane of theirsupporting-plates. The lower end f of plate e of the outer frame ishigher than the upper end of plate e (in the present instance an inch)and affords a stop for the inner frame to prevent its opening too far,as shown in Fig. 3.

With my arrangement the grooves or sockets for the plate D are so placedas to prevent the outer frame from becoming worn by friction-an objection inherent in all prior devices.

I claim 1. In a window-ventilator, the combination with an outer frame,of plates on the sides of said frame, each provided at its upper endwith a horizontal groove or hingesocket, an inner frame, andhinge-sections upon the rear surface and at the sides thereof adapted toride in said sockets. 2. In a window-ventilator, the combination with anouter frame, of plates mounted on the rear walls of said frame, eachprovided at its upper end with a horizontal groove or socket, an innerframe, hinge-plates upon the rear surface and near the edges of saidframe, each plate carrying at its lower end a cylindrical portionadapted to ride in one of said sockets, and stops carried by the outerframe adapted to limit the movement of said inner frame.

3. In a window-ventilator, the combination with an outer metal frame, ofplates mounted on the rear walls of said frame, each provided at itsupper end with a horizontal groove or socket, an inner metal frame, ahinge-plate upon the rear surface and at each side of said framecarrying at its lower end a cylindrical portion adapted t0 ride in oneof IOO said grooves, and inwardly-turned flanges at the top and bottomof said outer frame, extending on opposite sides of the inner frame toserve as stops therefor.

4. In a window-ventilator, the combination with an outer metal framecomposed of two U-shaped sections united at their ends by couplers, eachcoupler comprising two Vertical plates, united by a web extendingbetween opposite sides of said plates, the upper end of the lower platehaving a horizontal groove therein, and an inner frame carrying upon itsrear surface and at its sides plates having enlarged and rounded lowerends seated in said horizontal grooves.

5. In a window-ventilator, the combination with an outer frameconsisting of two U- shaped members formed of angle-iron arranged tobring two flanges in opposition to form front and rear jambs, theremaining flanges forming top, bottom and sides of the frame,hinge-sections connecting said U- shaped members and having webs lyingflush with the sides of said outer frame and abutting end to endtherewith, said sections having front and rear extensions overlappingthe front and rear j ambs and provided with shoulders receiving the endsthereof, the lower extensions having horizontal grooves in their upperends, an inner frame formed of angle-iron, hinge-sections for said framehaving hinge portions seated in said grooves and forming the swingingaxes of said inner frame, and stops engaging the upper and lower ends ofsaid inner frame on opposite sides thereof.

` GEORGE W. FROHLICH. Witnesses:

ELIZABETH ELKIN, JOHN SoHULTz.

